Inking mechanism for printing-presses.



W. M. EVENSEN.

INKING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED NOV. 30- I915- lmmw Patented Nov, 27, 1917.

WITNESSES UNITE STAES PATENT @FFlltlFl.

"WILL BE. EVENSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOSS PRINTING PRESS COMPANY, A CORPORATION OF ILLINOIS.

INKING MECHANISM FOR PRINTING-PRESSES.

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Specification of Letters Patent.

Patented Nov. 27, 191?.

To all whom it may concern:

Be it known that I, WILLIAM M. EVENSEN,

a citizen of the United States, residing at Chicago, county of Cook, and State of Illino1s, have invented certain new and useful Improvements in Inking Mechanisms for one embodiment of the invention, the same serving in connection with the description herein to explain the principles of the invention.

Of the drawings:

Figure 1 is a side elevation, omitting the machine frame and certain other parts, of a mechanism constructed in accordance with the principles of the invention;

Fig. 2 is a fragmentary elevation, looking at Fig. 1 from the right, but omitting the ink drum, and the actuating cam; and

Fig. 3 is a detail elevation of the cam looking at it from the left as it appears in Fig. 1.

In rapidly operating printing machines, such as rotary perfecting presses, and other rotary presses as well, it is very essential that there be rapid, accurate and uniform operation of the inking mechanism in order to attain good and acceptable printing. One point or place at which difficulty has existed in previous mechanisms is with the swinging roller which oscillates between the ink fountain roller and the ink drum, taking successive small quantities of ink from the fountain roller and supplying them to the drum. This roller is usually a composition roller, and it varies in size from time to time. Such a roller shrinks or becomes of lesser diameter with age, and later is replaced by a new roller of larger size or diameter than the old and shrunken one.

With such variations in the size of the swinging feeding roller in view, the present invention provides for preserving or maintaining a uniform coaction or degree of contact or pressure between the feed roller and both the fountain roll and the ink drum so that both the ink-taking and ink-transferring action may be kept eflicient and unimpaired, and also to avoid destructive contact or slamming of rollers.

These objects are attained by modifications in and control of the travel or swing of the feeding roller in-both directions and control of its pressure against both the fountain roller and the ink drum, by providing novel instrumentalities or means therefor and by the cooperation thereof with the old and known parts of the mechanism.

Referring by way of example to the accompanying drawings, the ink fountain is indicated by reference numeral 1, and'the fountain roller therewithin by 2. The usual or suitable ink drum 3 cooperates with the usual distributing or vibrating rollers (not shown), and these in turn cooperate with and ink the form rollers which latter ink the forms upon the cylinders in a wellknown manner.

The feed roller 4 swings to and fro between the fountain roller 2 and the ink drum 3, conveying periodically the required quantity of ink from the fountain roll 2 to the ink drum 3, the ink being carried forward therefrom to the forms as briefly described above. The fountain roller 2 is moved intermittently a small part of a rotation from time to time in the usual manner.

The roller 4; is supported by its pintles 5 in the upper end of arms 6, latches 7 serving to hold the roller 4 in such position. The roller carrying arms 6 are located within the press frame 7, and are fixed to a rock shaft 8 journaled in the press frame (only one of the arms 6 and one end of the roller 4 bein shown in the drawing). The arms 6 are "xed to the shaft 8 in a suitable manner, and preferably adjustably by means of set or clamping screws 9. The end of the rock shaft 8 extends outside the press frame 7, and upon the outside end of the shaft 8 is a lever arm 10, said lever arm being fixed to the shaft in any suitable manner, as by a key or feather 11.

The upper end of lever 10 has formed therein an arcuate or elongated slot or aperture 12, and at either side of the slot or aperture'said lever is provided with internally threaded bosses or extensions 13 and 14. Into these bosses, respectively, are threaded screws 15 and 16, provided respectively with looking nuts 17 and 19, the interior ends of the screws 15 and 16 projecting into the slot or aperture 12. Loosely mounted upon the exterior end of the shaft 8, so as to be freely rotatable thereupon, is a two-armed lever 20, the upper arm 21 thereof having mounted at its upper end a pin or stud 22, which stud rojects into the aperture 12 in lever 10, etween the points of the screws 15 and 16. By turning the screws 15 and 16 the angular relation of the lever arms 6 and 10 with respect to the lever 20 may be changed or regulated, the locking nuts serving to hold the parts in the desired adjusted position. By this mechanism the relative positions of ink feeding roller 4 and cam roller 24 may be varied and regulated as desired, and the proper contact or pressure is maintained between roller 4 and ink drum 3.

The other arm 23 of the lever 20 extends downwardly, and carries a cam roller 24. The cam roller 24 coiiperates with a suitable cam, shown as a face arm 25, carried upon the end of a shaft 26, which shaft is journaled upon the press frame and is rotated at suitable speed and by suitable mechanism (not'shown). In the embodied form, the cam 25 swings the fountain feeding ,roller 4 in one direction, the roller being swung backwardly in the other direction by" a spring or springs 27 (shown in Fig. 1) acting between the lever arms 6 and the frame of the machine.

In operation it is desirable to have the feed roller 4 swing to the fountain roller 2 without slamming thereagainst, and without having the roller 4 held too tightly against the surface of the fountain roller 2, but to bear thereagainst at the most advantageous pressure and to keep such pressure uniform despite changes in the size of the feeding roll 4. By the present in vention means are provided for preventin both such slammin and ti ht holding o the feed roller against the fountain roller and for maintaining proper ink-taking contact, said means in accordance with one a feature of the invention, coiiperating with the means for maintaining a proper pressure or coaction between the feed roller 4 and the ink drum 3, and notwithstanding variations in the size of the feed roller. As embodied, the cam 25 is made adjustable, or has an adjustable section, whereby the cam roller 24 follows the face of the cam at all times during the retraction of the mechanism by. the spring 27, although so far as concerns certain features of the invention the adjustment could be in some other part, such as the lever arm 23. As embodied, a portion of the face of the cam 25 consists of a segmental spring plate 28 attached to the surface of the cam 25 in a suitable manner as by screws 29 and 30, said. plate being mounted preferably to form a continuous cam surface. The spring plate 28 is rendered adjustable, as embodied, by an adjusting screw 31 threaded through the cam 25 and with its point bearing on the underside of the plate 28. By thls mechanism the desirable, result is effected of having the cam roller in contact with the face of the cam during the entire movement of the feeding roller 4, thereby preventing the roller 4 being drawn down, too tightly on to ink fountain roller 2 by springs 27. Also springs 27 are not permitted to slam roller 4 on to fountain roller 2, which is severely detrimental to both the composition or material of roller 4 and to its bearings in the arms 6.

When a new feeding roller 4 is put into use at its maximum diameter, the cam 25 is regulated by raising or lowering the spring plate 28 by turning the screw 31, so that just the desired amount of impingement and pressure against fountain roller 2 and against ink drum 3 is obtained. As stated,

the composition roller 4 shrinks with age, and as it becomes smaller in diameter, the amount of throw or travel of levers 6 is slightly increased in the direction of fountain roll 2 by lowering plate 28 by means of screw 31, the roller 24 at all times following the face of the cam, and the action and travel of roller 4 being controlled thereby. By screws 15 and 16 feeding roller 4 is kept in proper relation with ink drum 3, both as to its throw or travel and the degree of pressure against the drum. There is thus furnished a complete regulation and control for variations in the size of the feed roll 4 so as to preserve the inking action at highest efiiciency and avoiding harm ful and improper action of the mechanism.

It will be understood that changes may be made in the particular mechanism shown and described, without departing from the principles of the invention, and without sacrificing its chief objects and advantages.

What I claim as my invention and desire to secure by Letters Patent is 1. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, arms upon which the feed roller is mounted, a shaft for said arms, means for varying the angular adjustment between said arms and shaft, means for rocking said arms and shaft, said rocking means including a cam arm extending from said shaft, a cam for actuating said cam arm mana e and means for adjusting the relation of said cam arm and cam. v

2. An inking mechanism for a printing press including in combination an ink foun tain roller, an ink drum, a feed roller swing in therebetween, arms upon which the feed ro ler is mounted, a shaft for said arms, means for varying the angular adjustment between said arms and shaft, means for rocking said arms and shaft, said rocking means including a cam arm extending from said shaft, a cam for actuating said cam arm and an adjustable section upon said cam.

3. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, arms upon which the feed roller is mounted, a shaft for said arms, means for varying the angular adjustment between said arms and shaft, means for rocking said arms and shaft, said rocking means including a cam arm extending from said shaft, a cam for actuating said cam arm, a spring working in the opposite direction from said cam, and means for adjusting the relation of said cam and cam arm to control the action of said spring to compensafie for variations in the size of said feed ro 4. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, pivoted lever arms for swinging said feed roller, and means for varying the angular relation of said arms with respect to each other, and a cam for actuating one of said arms, and'means for varying the relation of said cam and the arm actuated thereby.

5. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, means for swinging the roller including devices for positively limiting the travel of the feed roller in both directions, said devices includin a cam hav ing a portion of its face ad ustable relatively to another portion of said face.

6. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, means for swinging the roller including a cam having the high and low parts thereof relatively adjustable and a spring cooperating with said cam.

7. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, means for swinging the roller including pivoted arms,/a rotating cam having its face cooperating with one of said arms, and having the hlgh and low parts of its face relatively adjustable.

' 8. An inking mechanism for a printing press including in combination an ink fountain roller, an ink drum, a feed roller swinging therebetween, means for swinging the roller including pivoted arms, a rotating cam having its face cooperating with one of said arms, and devices for relatively adjusting the high and low parts of the camface including a spring plate constituting a part of the cam face and an adjusting screw therefor.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

Lian M. nvnusnn.

Witnesses:

JOSEPH J. WALsER, ELIZABETH C. 

